Barracuda VPN Client for Linux / Mac OS / OpenBSD

Barracuda Networks Technical Documentation 

Barracuda VPN Client for Linux/Mac OS/OpenBSD 

Administrator’s Guide 

Version 2.8 

RECLAIM YOUR NETWORK

Copyright Notice 

Copyright (c) 2004-2011, Barracuda Networks, Inc., 3175 S. Winchester Blvd, Campbell, CA 95008 USA 

www.barracuda.com 

v2.8-070213-12-0321 

All rights reserved. Use of this product and this manual is subject to license. Information in this document is subject to change without notice. 

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trademarks of their respective holders.

1.1 General 

3 

Chapter 1 

Installation 

The following explains how to install and configure the Barracuda VPN client on your client computer 

running under Linux, OpenBSD or Mac OS X. 

You need to know these configuration parameters: 

You can get all thers information from your network administrator. 

• IP address and port of the Barracuda VPN server 

• local password for your license 

• server password 

• several connection-dependent parameters explained below 

• 

For the VPN client installation the following requirements are essential: 

1.2 Procedure 

• recent linux-distribution 

• required license (one of the following, depending on authentication type): 

• Barracuda personal license 

• x.509 certificate 

• no license required for user/password authentication 

1.) Get the appropriate installation package 

If there is an older version of the Barracuda VPN Client installed, it must be removed manually using 

rm /usr/local/bin/barracudavpn, since older versions were not package based, and thus the 

installation of Barracuda VPN Client will fail. 

• RPM package based Linux systems 

For RPM package based Linux systems (Novell/SuSE or RedHat/Fedora), there are two 

RPM packages: barracudavpn-20-SP2.i386.rpm contains the dynamically linked Barracuda 

VPN client for Linux, barracudavpn-2.0-SP2_STATIC.i386.rpm the statically 

linked one. Use the statically linked client, if some dependencies of the dynamically linked 

one are not satisfied on the target system. 

Install the package as root with the command 

rpm -Uh barracudavpn-2.0-SP2.i386.rpm

(rpm -Uh barracudavpn-2.0-SP2_STATIC.i386.rpm for the statically linked version). 

• Debian 

For Debian Linux the package is called barracudavpn_2.0-SP2_i386.deb. Install the 

package as root with the command dpkg -i barracudavpn_2.0-SP2_i386.deb. 

• OpenBSD 

The package for the OpenBSD client is called barracudavpn-2.0-SP2.tgz. Install the 

package as root with the command pkg_add barracudavpn-2.0-SP2.tgz. 

barracudavpn-2.0-SP2.tgz is an OpenBSD package and not just a tar.gz. Do NOT install using tar. 

• Mac OS X 

The installation file for the Mac client is called barracudaVPN_setup.command. For installation 

open a terminal, change to the superuser with sudo su and start the installation 

in the directory where the package is located with the command 

./barracudaVPN_setup.command . 

2.) Installing the License file 

On Linux and OpenBSD license files have to be saved to the directory /etc/barracudavpn. 

On Mac OS X license files have to be saved to the directory /System/Library/barracudavpn. 

Depending on the type of authentication and certificate, the copying procedure slightly differs: 

• Barracuda Authentication 

If a vpnpers.lic is provided, this file has to be copied to /etc/barracudavpn/ or 

/System/Library/barracudavpn respectively. 

• x.509 Certificate 

This type of certificate offers two possible ways of delivery: either a p12-file or a packet of 

three files (cert.pem, key.pem and ca.pem). 

• p12-file 

If a p12-file (cert.p12) is provided, this file has to be copied to /etc/barracudavpn/ or 

/System/Library/barracudavpn respectively. 

• packet 

If a certificate packet is provided, copy the files as described in the following: 

• Linux and OpenBSD 

cert.pem to /etc/barracudavpn/ 

key.pem to /etc/barracudavpn/ 

ca.pem to /etc/barracudavpn/ca/ 


cert.pem to /System/Library/barracudavpn/ 

key.pem to /System/Library/barracudavpn/ 

4 Barracuda VPN Client for Linux/Mac OS/OpenBSD - Administrator’s Guide

2.1 General 

5 

Disconnect before installing your new client. 

2.2 Procedure 

Chapter 2 

Update 

The binary for updating the Barracuda VPN Client for Linux can be received in two different ways: 

• Via User Interface: 

Your network administrator is able to provide you with client updates. If there exists such 

an update, you can load them onto your machine and install them. For this function you 

have to be connected. Your download will be saved under /tmp/. You need to install the 

update likewise you installed the original client. 

Fig. 2–1 Update client download dialogue 

• Conventional distribution (email, floppy, etc.): 

You need to install the update likewise you installed the original client.


3.1 General 

3.2 Configuration Paramters 

7 

Chapter 3 

Configuration 

To run the VPN client you need to be either root (or equivalent) or the binary has to have the setuid-flag set 

(command line: chmod 4755 /usr/sbin/barracudavpn). 

When starting the VPN client for the first time (barracudavpn), you will have to configure your client. 

If you have used a client prior version 2, your old configuration will not get moved over to the new client. Your 

old configuration will not get modified though. 

Fig. 3–1 Configuration dialogue 

The orange entry boxes are mandatory ones. Depending on your type of connection there are more or 

less boxes to fill. The symbol indicates entries where you can select several values from a list by 

pressing < or >.

• Authentication 

This parameter defines the type of authentication that has to be used for successful connection. 

For details on the required authentication method, please contact your administrator. 

Available settings are: 

• Public Key 

• X509 Cert 

• X509 Cert+User/Pass 

• User/Pass only 

• Server Address / Server Port 

IP address(es) and server port of the VPN server(s). 

Use a comma as address separator. 

• Proxy Type 

Depending on your connection several settings are possible: 

Section EXPERT SETTINGS (USE WITH CARE) 

• NO PROXY 

use a direct connection to your VPN server 

• HTTP 

connect via a HTTP Proxy (example: squid) 

• SOCKS4 

connect via a SOCKS4 server 

• SOCKS5 

connect via a SOCKS5 server 

You have to provide IP address, port number and, if needed, a username. If a password is required, you will be 

prompted for it when connecting. Common port numbers are 3128 or 8080. Your network administrator will be 

able to provide the correct values. 

This section contains some options for fine tuning the VPN client. Not all entries are mandatory. Some 

entries depend on the used Proxy type. 

• Special Mode 

Following modes are available: 

• NONE 

normal operation 

• SILENT 

deactivate keep-alive packets to the VPN server. This mode allows adapters 

such as ISDN cards to hang-up the line during idle time. Otherwise the 

communication between client and server would always trigger a connection. 

• Source IP to use 

IP address to be used as source for your client. 


9 

• Tunnel Mode 

Tampering with this option can alter the usability of applications, i.e. from weird effects to crashes with data loss. 

The available modes are UDP, TCP and Hybrid. The mode Hybrid combines the best of both connection 

types: reliability of TCP and response of UDP. 

• Tunnel Rekey Time 

Time in minutes after which client and server exchange new keys. 

• Tunnel Encryption 

Several different encryption schemes, such as AES, CAST, Blowfish, etc. 

• Tap device 

Defines the tap device used for the VPN tunnel. Linux now uses the universal TUN/TAP 

driver. Therefore use /dev/net/tun as tap device. 

• Keepalive 

This parameter defines the timeout for re-connecting the tunnel. When having a GPRS connection 

this value should be increased to avoid permanently reconnects due to dropouts. 

• Configure DNS 

With Yes selected the system’s DNS configuration is replaced with the VPN provided one, 

and the VPN domain configured on the VPN server is added to the search path in 

/etc/resolv.conf. With No selected, the VPN provided DNS configuration is ignored. 

Merge effects that the VPN provided DNS configuration is merged to the system’s DNS configuration. 

On Linux and OpenBSD the configuration is saved to the plain text ASCII-file 

/etc/barracudavpn/barracudavpn2.conf. 

On Mac OS X The configuration is saved to the plain text 

ASCII-file /System/Library/barracudavpn/barracudavpn2.conf.


4.1 Dialogue 

11 

Chapter 4 

Start 

Starting the Barracuda VPN client for Linux by entering barracudavpn, opens a window similar to:. 

Fig. 4–1 Main menu 

4.2 Options 

The following options are available: 

• Open Connection 

opens a VPN connection 

• Close Connection 

stops a VPN connection 

• Configure Client 

opens the configuration dialogue; for changes to take effect the connection has to be terminated 

and reopened. 

• Connection Status

Fig. 4–2 Connection Status 

displays some information such as throughput, IP, Routes, Gateway, DNS and your license 

• Change Server Password 

change your Server password, which is needed for connecting 

• Change Local Password 

change the password used to protect your license file 

• Update Client 

Your network administrator is able to provide you with client updates. If there exists such 

an update, you can load them onto your machine and install them. For this function you 

have to be connected. Your download will be saved under /tmp/. You need to install the 

update likewise you installed the original client. 

Disconnect before installing the new client. 


13 

Fig. 4–3 Update client download dialogue 

• Exit 

exits the VPN client. 

This leaves an already established connection open. 

barracudavpn forks a background process, which keeps running even if you exit the main client. This is needed 

for controlling the connection. As soon as you close the connection this second process will die, too.


5.1 Usage 

15 

barracudavpn [options] 

where options are: 

-s --start Start VPN tunnel 

-p --stop Stop VPN tunnel 

-t --status Show tunnel status 

-k --keypwd Password for local key 

-r --serverpwd Server password 

-c --config Path name to configuration 

-V --version Print VPN client version 

-v --verbose Show debug output 

-h --help this help 

Chapter 5 

Command Line


6.1 General 

17 

Prior to uninstalling the Barracuda VPN Client, close all running VPN connections. 

6.2 Procedure 

1.) Removing Barracuda VPN binary 

• RPM package based Linux systems 

Chapter 6 

Uninstall 

For RPM package based Linux systems as root enter rpm -e barracudavpn. 

• Debian 

For Debian Linux as root enter dpkg -r barracudavpn. 

• OpenBSD 

For OpenBSD as root enter pkg_delete barracudaVPN-2.0-SP2. 


For Mac OS X remove the shortcut in the Dock and execute 

rm /usr/local/bin/barracudavpn in a terminal. 

2.) Removing certificates and licenses (optional) 

Removing the certificates is done by entering the following command line: 

• On Linux and OpenBSD: 

rm -rf /etc/barracudavpn 

• On Mac OS X: 

rm -rf /System/Library/barracudavpn


19 

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21

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Barracuda Networks equipment owned or leased by you. All subscriptions are non-transferrable. Barracuda Networks 

makes no warranty that subscriptions will continue un-interrupted. Subscription may be terminated without notice by 

Barracuda Networks for lack of full payment. 

17. Auto Renewals. If your Software purchase is a time based license, includes software maintenance, or includes a 

subscription, you hereby agree to automatically renew this purchase when it expires unless you notify Barracuda 15 days 

before the renewal date. Barracuda Networks will automatically bill you or charge you unless notified 15 days before the 

renewal date. 

18. Time Base License. If your Software purchase is a time based license you expressly acknowledge that the Software will 

stop functioning at the time the license expires. You expressly indemnify and hold harmless Barracuda Networks for any and 

all damages that may occur because of this. 

19. Support. Telephone, email and other forms of support will be provided to you if you have purchased a product that 

includes support. The hours of support vary based on country and the type of support purchased. Barracuda Networks 

Energize Updates typically include Basic support. 

20. Changes. Barracuda Networks reserves the right at any time not to release or to discontinue release of any Software or 

Subscription and to alter prices, features, specifications, capabilities, functions, licensing terms, release dates, general 

availability or other characteristics of any future releases of the Software or Subscriptions. 

21. Open Source Licensing. Barracuda Networks products may include programs that are covered by the GNU General Public 

License (GPL) or other Open Source license agreements, in particular the Linux operating system. It is expressly put on 

record that the Software does not constitute an edited version or further development of the operating system. These 

programs are copyrighted by their authors or other parties, and the authors and copyright holders disclaim any warranty for 

such programs. Other programs are copyright by Barracuda Networks. Further details may be provided in an appendix to 

this agreement where the licenses are re-printed. Barracuda Networks makes available the source code used to build 

Barracuda products available at source.barracuda.com. This directory includes all the open source programs that are 

distributed on the Barracuda products. Obviously not all of these programs are utilized, but since they are distributed on the 

Barracuda product we are required to make the source code available. 

9 Barracuda Networks Software License Agreement Appendix 

The following license agreements may apply to the software provided by Barracuda Networks. 

The GNU General Public License (GPL) Version 2, June 1991 

Copyright (C) 1989, 1991 Free Software Foundation, Inc. 

59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 

Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. 

Preamble 


The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General 

Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free 

for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other 

program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Library 

General Public License instead.) You can apply it to your programs, too. 

When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make 

sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive 

source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that 

you know you can do these things. 

To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender 

the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you 

modify it. 

For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights 

that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms 

so they know their rights. 

We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal 

permission to copy, distribute and/or modify the software. 

Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for 

this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they 

have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. 

Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a 

free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have 

made it clear that any patent must be licensed for everyone's free use or not licensed at all. 

The precise terms and conditions for copying, distribution and modification follow. 

TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 

0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be 

distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a 

"work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work 

containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. 

(Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". 

Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The 

act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a 

work based on the Program (independent of having been made by running the Program). Whether that is true depends on 

what the Program does. 

1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that 

you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep 

intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the 

Program a copy of this License along with the Program. 

You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in 

exchange for a fee. 

2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and 

copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these 

conditions: 

a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any 

change. 

b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or 

any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. 

c) If the modified program normally reads commands interactively when run, you must cause it, when started running for 

such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice 

and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the 

program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is 

interactive but does not normally print such an announcement, your work based on the Program is not required to print an 

announcement.) 

23

These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the 

Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, 

do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as 

part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, 

whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. 

Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent 

is to exercise the right to control the distribution of derivative or collective works based on the Program. 

In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the 

Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 

3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under 

the terms of Sections 1 and 2 above provided that you also do one of the following: 

a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms 

of Sections 1 and 2 above on a medium customarily used for software interchange; or, 

b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your 

cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be 

distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, 

c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This alternative 

is allowed only for noncommercial distribution and only if you received the program in object code or executable form with 

such an offer, in accord with Subsection b above.) 

The source code for a work means the preferred form of the work for making modifications to it. For an executable work, 

complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus 

the scripts used to control compilation and installation of the executable. However, as a special exception, the source code 

distributed need not include anything that is normally distributed (in either source or binary form) with the major 

components (compiler, kernel, and so on) of the operating system on which the executable runs, unless that component itself 

accompanies the executable. 

If distribution of executable or object code is made by offering access to copy from a designated place, then offering 

equivalent access to copy the source code from the same place counts as distribution of the source code, even though third 

parties are not compelled to copy the source along with the object code. 

4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any 

attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights 

under this License. However, parties who have received copies, or rights, from you under this License will not have their 

licenses terminated so long as such parties remain in full compliance. 

5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to 

modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this 

License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your 

acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or 

works based on it. 

6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license 

from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not 

impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing 

compliance by third parties to this License. 

7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent 

issues), conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of 

this License, they do not excuse you from the conditions of this License. If you cannot distribute so as to satisfy 

simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not 

distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution of the Program by 

all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this License 

would be to refrain entirely from distribution of the Program. 

If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is 

intended to apply and the section as a whole is intended to apply in other circumstances. 

It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity 

of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, 

which is implemented by public license practices. Many people have made generous contributions to the wide range of 

software distributed through that system in reliance on consistent application of that system; it is up to the author/donor to 

decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice. 


This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License. 

8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted 

interfaces, the original copyright holder who places the Program under this License may add an explicit geographical 

distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus 

excluded. In such case, this License incorporates the limitation as if written in the body of this License. 

9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. 

Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or 

concerns. 

Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies 

to it and "any later version", you have the option of following the terms and conditions either of that version or of any later 

version published by the Free Software Foundation. If the Program does not specify a version number of this License, you 

may choose any version ever published by the Free Software Foundation. 

10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write 

to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free 

Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the 

free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. 

NO WARRANTY 

11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT 

PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR 

OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, 

INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 

PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 

PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 

12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR 

ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU 

FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 

USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED 

INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH 

ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 

DAMAGES. 

END OF GNU TERMS AND CONDITIONS 

Barracuda Networks products may include programs that are covered by the GNU General Public License. The GNU General 

Public License is re-printed below for you reference. 

Copyright © 2007 Free Software Foundation, Inc. 


Preamble 

The GNU General Public License is a free, copyleft license for software and other kinds of works. 

The licenses for most software and other practical works are designed to take away your freedom to share and change the 

works. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions 

of a program--to make sure it remains free software for all its users. We, the Free Software Foundation, use the GNU General 

Public License for most of our software; it applies also to any other work released this way by its authors. You can apply it to 

your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are 

designed to make sure that you have the freedom to distribute copies of free software (and charge for them if you wish), that 

you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free 

programs, and that you know you can do these things. To protect your rights, we need to prevent others from denying you 

these rights or asking you to surrender the rights. Therefore, you have certain responsibilities if you distribute copies of the 

software, or if you modify it: responsibilities to respect the freedom of others. 

25

For example, if you distribute copies of such a program, whether gratis or for a fee, you must pass on to the recipients the 

same freedoms that you received. You must make sure that they, too, receive or can get the source code. And you must show 

them these terms so they know their rights. 

Developers that use the GNU GPL protect your rights with two steps: (1) assert copyright on the software, and (2) offer you 

this License giving you legal permission to copy, distribute and/or modify it. 

For the developers' and authors' protection, the GPL clearly explains that there is no warranty for this free software. For 

both users' and authors' sake, the GPL requires that modified versions be marked as changed, so that their problems will not 

be attributed erroneously to authors of previous versions. 

Some devices are designed to deny users access to install or run modified versions of the software inside them, although the 

manufacturer can do so. This is fundamentally incompatible with the aim of protecting users' freedom to change the 

software. The systematic pattern of such abuse occurs in the area of products for individuals to use, which is precisely where 

it is most unacceptable. Therefore, we have designed this version of the GPL to prohibit the practice for those products. If 

such problems arise substantially in other domains, we stand ready to extend this provision to those domains in future 

versions of the GPL, as needed to protect the freedom of users. 

Finally, every program is threatened constantly by software patents. States should not allow patents to restrict development 

and use of software on general-purpose computers, but in those that do, we wish to avoid the special danger that patents 

applied to a free program could make it effectively proprietary. To prevent this, the GPL assures that patents cannot be used 

to render the program non-free. 

The precise terms and conditions for copying, distribution and modification follow. 

TERMS AND CONDITIONS 

0. Definitions. 

“This License” refers to version 3 of the GNU General Public License. 

“Copyright” also means copyright-like laws that apply to other kinds of works, such as semiconductor masks. 

“The Program” refers to any copyrightable work licensed under this License. Each licensee is addressed as “you”. 

“Licensees” and “recipients” may be individuals or organizations. 

To “modify” a work means to copy from or adapt all or part of the work in a fashion requiring copyright permission, other 

than the making of an exact copy. The resulting work is called a “modified version” of the earlier work or a work “based on” 

the earlier work. 

A “covered work” means either the unmodified Program or a work based on the Program. 

To “propagate” a work means to do anything with it that, without permission, would make you directly or secondarily liable 

for infringement under applicable copyright law, except executing it on a computer or modifying a private copy. Propagation 

includes copying, distribution (with or without modification), making available to the public, and in some countries other 

activities as well. 

To “convey” a work means any kind of propagation that enables other parties to make or receive copies. Mere interaction 

with a user through a computer network, with no transfer of a copy, is not conveying. 

An interactive user interface displays “Appropriate Legal Notices” to the extent that it includes a convenient and 

prominently visible feature that (1) displays an appropriate copyright notice, and (2) tells the user that there is no warranty 

for the work (except to the extent that warranties are provided), that licensees may convey the work under this License, and 

how to view a copy of this License. If the interface presents a list of user commands or options, such as a menu, a prominent 

item in the list meets this criterion. 

1. Source Code. 

The “source code” for a work means the preferred form of the work for making modifications to it. “Object code” means any 

non-source form of a work. 

A “Standard Interface” means an interface that either is an official standard defined by a recognized standards body, or, in 

the case of interfaces specified for a particular programming language, one that is widely used among developers working in 

that language. 

The “System Libraries” of an executable work include anything, other than the work as a whole, that (a) is included in the 

normal form of packaging a Major Component, but which is not part of that Major Component, and (b) serves only to enable 

use of the work with that Major Component, or to implement a Standard Interface for which an implementation is available to 

the public in source code form. A “Major Component”, in this context, means a major essential component (kernel, window 

system, and so on) of the specific operating system (if any) on which the executable work runs, or a compiler used to produce 

the work, or an object code interpreter used to run it. 


The “Corresponding Source” for a work in object code form means all the source code needed to generate, install, and (for an 

executable work) run the object code and to modify the work, including scripts to control those activities. However, it does 

not include the work's System Libraries, or general-purpose tools or generally available free programs which are used 

unmodified in performing those activities but which are not part of the work. For example, Corresponding Source includes 

interface definition files associated with source files for the work, and the source code for shared libraries and dynamically 

linked subprograms that the work is specifically designed to require, such as by intimate data communication or control flow 

between those subprograms and other parts of the work. 

The Corresponding Source need not include anything that users can regenerate automatically from other parts of the 

Corresponding Source. 

The Corresponding Source for a work in source code form is that same work. 

2. Basic Permissions. 

All rights granted under this License are granted for the term of copyright on the Program, and are irrevocable provided the 

stated conditions are met. This License explicitly affirms your unlimited permission to run the unmodified Program. The 

output from running a covered work is covered by this License only if the output, given its content, constitutes a covered 

work. This License acknowledges your rights of fair use or other equivalent, as provided by copyright law. 

You may make, run and propagate covered works that you do not convey, without conditions so long as your license 

otherwise remains in force. You may convey covered works to others for the sole purpose of having them make 

modifications exclusively for you, or provide you with facilities for running those works, provided that you comply with the 

terms of this License in conveying all material for which you do not control copyright. Those thus making or running the 

covered works for you must do so exclusively on your behalf, under your direction and control, on terms that prohibit them 

from making any copies of your copyrighted material outside their relationship with you. 

Conveying under any other circumstances is permitted solely under the conditions stated below. Sublicensing is not allowed; 

section 10 makes it unnecessary. 

3. Protecting Users' Legal Rights From Anti-Circumvention Law. 

No covered work shall be deemed part of an effective technological measure under any applicable law fulfilling obligations 

under article 11 of the WIPO copyright treaty adopted on 20 December 1996, or similar laws prohibiting or restricting 

circumvention of such measures. 

When you convey a covered work, you waive any legal power to forbid circumvention of technological measures to the extent 

such circumvention is effected by exercising rights under this License with respect to the covered work, and you disclaim any 

intention to limit operation or modification of the work as a means of enforcing, against the work's users, your or third 

parties' legal rights to forbid circumvention of technological measures. 

4. Conveying Verbatim Copies. 

You may convey verbatim copies of the Program's source code as you receive it, in any medium, provided that you 

conspicuously and appropriately publish on each copy an appropriate copyright notice; keep intact all notices stating that 

this License and any non-permissive terms added in accord with section 7 apply to the code; keep intact all notices of the 

absence of any warranty; and give all recipients a copy of this License along with the Program. 

You may charge any price or no price for each copy that you convey, and you may offer support or warranty protection for a 

fee. 

5. Conveying Modified Source Versions. 

You may convey a work based on the Program, or the modifications to produce it from the Program, in the form of source 

code under the terms of section 4, provided that you also meet all of these conditions: 

* a) The work must carry prominent notices stating that you modified it, and giving a relevant date. 

* b) The work must carry prominent notices stating that it is released under this License and any conditions added under 

section 7. This requirement modifies the requirement in section 4 to “keep intact all notices”. 

* c) You must license the entire work, as a whole, under this License to anyone who comes into possession of a copy. This 

License will therefore apply, along with any applicable section 7 additional terms, to the whole of the work, and all its parts, 

regardless of how they are packaged. This License gives no permission to license the work in any other way, but it does not 

invalidate such permission if you have separately received it. 

* d) If the work has interactive user interfaces, each must display Appropriate Legal Notices; however, if the Program has 

interactive interfaces that do not display Appropriate Legal Notices, your work need not make them do so. 

A compilation of a covered work with other separate and independent works, which are not by their nature extensions of the 

covered work, and which are not combined with it such as to form a larger program, in or on a volume of a storage or 

distribution medium, is called an “aggregate” if the compilation and its resulting copyright are not used to limit the access or 

27

legal rights of the compilation's users beyond what the individual works permit. Inclusion of a covered work in an aggregate 

does not cause this License to apply to the other parts of the aggregate. 

6. Conveying Non-Source Forms. 

You may convey a covered work in object code form under the terms of sections 4 and 5, provided that you also convey the 

machine-readable Corresponding Source under the terms of this License, in one of these ways: 

* a) Convey the object code in, or embodied in, a physical product (including a physical distribution medium), accompanied by 

the Corresponding Source fixed on a durable physical medium customarily used for software interchange. 

* b) Convey the object code in, or embodied in, a physical product (including a physical distribution medium), accompanied by 

a written offer, valid for at least three years and valid for as long as you offer spare parts or customer support for that 

product model, to give anyone who possesses the object code either (1) a copy of the Corresponding Source for all the 

software in the product that is covered by this License, on a durable physical medium customarily used for software 

interchange, for a price no more than your reasonable cost of physically performing this conveying of source, or (2) access to 

copy the Corresponding Source from a network server at no charge. 

* c) Convey individual copies of the object code with a copy of the written offer to provide the Corresponding Source. This 

alternative is allowed only occasionally and noncommercially, and only if you received the object code with such an offer, in 

accord with subsection 6b. 

* d) Convey the object code by offering access from a designated place (gratis or for a charge), and offer equivalent access 

to the Corresponding Source in the same way through the same place at no further charge. You need not require recipients 

to copy the Corresponding Source along with the object code. If the place to copy the object code is a network server, the 

Corresponding Source may be on a different server (operated by you or a third party) that supports equivalent copying 

facilities, provided you maintain clear directions next to the object code saying where to find the Corresponding Source. 

Regardless of what server hosts the Corresponding Source, you remain obligated to ensure that it is available for as long as 

needed to satisfy these requirements. 

* e) Convey the object code using peer-to-peer transmission, provided you inform other peers where the object code and 

Corresponding Source of the work are being offered to the general public at no charge under subsection 6d. 

A separable portion of the object code, whose source code is excluded from the Corresponding Source as a System Library, 

need not be included in conveying the object code work. 

A “User Product” is either (1) a “consumer product”, which means any tangible personal property which is normally used for 

personal, family, or household purposes, or (2) anything designed or sold for incorporation into a dwelling. In determining 

whether a product is a consumer product, doubtful cases shall be resolved in favor of coverage. For a particular product 

received by a particular user, “normally used” refers to a typical or common use of that class of product, regardless of the 

status of the particular user or of the way in which the particular user actually uses, or expects or is expected to use, the 

product. A product is a consumer product regardless of whether the product has substantial commercial, industrial or 

non-consumer uses, unless such uses represent the only significant mode of use of the product. 

“Installation Information” for a User Product means any methods, procedures, authorization keys, or other information 

required to install and execute modified versions of a covered work in that User Product from a modified version of its 

Corresponding Source. The information must suffice to ensure that the continued functioning of the modified object code is 

in no case prevented or interfered with solely because modification has been made. 

If you convey an object code work under this section in, or with, or specifically for use in, a User Product, and the conveying 

occurs as part of a transaction in which the right of possession and use of the User Product is transferred to the recipient in 

perpetuity or for a fixed term (regardless of how the transaction is characterized), the Corresponding Source conveyed 

under this section must be accompanied by the Installation Information. But this requirement does not apply if neither you 

nor any third party retains the ability to install modified object code on the User Product (for example, the work has been 

installed in ROM). 

The requirement to provide Installation Information does not include a requirement to continue to provide support service, 

warranty, or updates for a work that has been modified or installed by the recipient, or for the User Product in which it has 

been modified or installed. Access to a network may be denied when the modification itself materially and adversely affects 

the operation of the network or violates the rules and protocols for communication across the network. 

Corresponding Source conveyed, and Installation Information provided, in accord with this section must be in a format that is 

publicly documented (and with an implementation available to the public in source code form), and must require no special 

password or key for unpacking, reading or copying. 

7. Additional Terms. 

“Additional permissions” are terms that supplement the terms of this License by making exceptions from one or more of its 

conditions. Additional permissions that are applicable to the entire Program shall be treated as though they were included in 

this License, to the extent that they are valid under applicable law. If additional permissions apply only to part of the 


Program, that part may be used separately under those permissions, but the entire Program remains governed by this 

License without regard to the additional permissions. 

When you convey a copy of a covered work, you may at your option remove any additional permissions from that copy, or 

from any part of it. (Additional permissions may be written to require their own removal in certain cases when you modify the 

work.) You may place additional permissions on material, added by you to a covered work, for which you have or can give 

appropriate copyright permission. 

Notwithstanding any other provision of this License, for material you add to a covered work, you may (if authorized by the 

copyright holders of that material) supplement the terms of this License with terms: 

* a) Disclaiming warranty or limiting liability differently from the terms of sections 15 and 16 of this License; or 

* b) Requiring preservation of specified reasonable legal notices or author attributions in that material or in the Appropriate 

Legal Notices displayed by works containing it; or 

* c) Prohibiting misrepresentation of the origin of that material, or requiring that modified versions of such material be 

marked in reasonable ways as different from the original version; or 

* d) Limiting the use for publicity purposes of names of licensors or authors of the material; or 

* e) Declining to grant rights under trademark law for use of some trade names, trademarks, or service marks; or 

* f) Requiring indemnification of licensors and authors of that material by anyone who conveys the material (or modified 

versions of it) with contractual assumptions of liability to the recipient, for any liability that these contractual assumptions 

directly impose on those licensors and authors. 

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"You" is you, if you're thinking about copying or distributing this Package. 

"Reasonable copying fee" is whatever you can justify on the basis of media cost, duplication charges, time of people 

involved, and so on. (You will not be required to justify it to the Copyright Holder, but only to the computing community at 

large as a market that must bear the fee.) 

"Freely Available" means that no fee is charged for the item itself, though there may be fees involved in handling the item. 

It also means that recipients of the item may redistribute it under the same conditions they received it. 

Conditions 

1. You may make and give away verbatim copies of the source form of the Standard Version of this Package without 

restriction, provided that you duplicate all of the original copyright notices and associated disclaimers. 

2. You may apply bug fixes, portability fixes and other modifications derived from the Public Domain or from the Copyright 

Holder. A Package modified in such a way shall still be considered the Standard Version. 

3. You may otherwise modify your copy of this Package in any way, provided that you insert a prominent notice in each 

changed file stating how and when you changed that file, and provided that you do at least ONE of the following: 

a) place your modifications in the Public Domain or otherwise make them Freely Available, such as by posting said 

modifications to Usenet or an equivalent medium, or placing the modifications on a major archive site such as uunet.uu.net, 

or by allowing the Copyright Holder to include your modifications in the Standard Version of the Package. 

b) use the modified Package only within your corporation or organization. 

c) rename any non-standard executables so the names do not conflict with standard executables, which must also be 

provided, and provide a separate manual page for each non-standard executable that clearly documents how it differs from 

the Standard Version. 

d) make other distribution arrangements with the Copyright Holder. 

4. You may distribute the programs of this Package in object code or executable form, provided that you do at least ONE of 

the following: 

a) distribute a Standard Version of the executables and library files, together with instructions (in the manual page or 

equivalent) on where to get the Standard Version. 

b) accompany the distribution with the machine-readable source of the Package with your modifications. 

c) give non-standard executables non-standard names, and clearly document the differences in manual pages (or 

equivalent), together with instructions on where to get the Standard Version. 


5. You may charge a reasonable copying fee for any distribution of this Package. You may charge any fee you choose for 

support of this Package. You may not charge a fee for this Package itself. However, you may distribute this Package in 


aggregate with other (possibly commercial) programs as part of a larger (possibly commercial) software distribution 

provided that you do not advertise this Package as a product of your own. You may embed this Package's interpreter within 

an executable of yours (by linking); this shall be construed as a mere form of aggregation, provided that the complete 

Standard Version of the interpreter is so embedded. 

6. The scripts and library files supplied as input to or produced as output from the programs of this Package do not 

automatically fall under the copyright of this Package, but belong to whoever generated them, and may be sold 

commercially, and may be aggregated with this Package. If such scripts or library files are aggregated with this Package via 

the so-called "undump" or "unexec" methods of producing a binary executable image, then distribution of such an image 

shall neither be construed as a distribution of this Package nor shall it fall under the restrictions of Paragraphs 3 and 4, 

provided that you do not represent such an executable image as a Standard Version of this Package. 

7. C subroutines (or comparably compiled subroutines in other languages) supplied by you and linked into this Package in 

order to emulate subroutines and variables of the language defined by this Package shall not be considered part of this 

Package, but are the equivalent of input as in Paragraph 6, provided these sub-routines do not change the language in any 

way that would cause it to fail the regression tests for the language. 

8. Aggregation of this Package with a commercial distribution is always permitted provided that the use of this Package is 

embedded; that is, when no overt attempt is made to make this Package's interfaces visible to the end user of the commercial 

distribution. Such use shall not be construed as a distribution of this Package. 

9. The name of the Copyright Holder may not be used to endorse or promote products derived from this software without 

specific prior written permission. 

10. THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT 

LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 

The End 

Barracuda Networks Products may contain programs and software that are covered by the MIT-License 

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following 

conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the 

following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and 

the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the names of 

the author(s) nor the names of other contributors may be used to endorse or promote products derived from this software 

without specific prior written permission. Disclaimer THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 

CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 

THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 

CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 

LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 

WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 

OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. (Note: The above license is 

copied from the BSD license at: www.opensource.org/licenses/bsd-license.html, substituting the appropriate references in 

the template.) (end) 

Barracuda Networks Software may include programs that are covered by the Mozilla Public License Version 1.1 


1.0.1 "Commercial Use" means distribution or otherwise making the Covered Code available to a third party. 

1.1 "Contributor" means each entity that creates or contributes to the creation of Modifications. 

1.2 "Contributor Version" means the combination of the Original Code, prior Modifications used by a Contributor, and the 

Modifications made by that particular Contributor. 

1.3 "Covered Code" means the Original Code or Modifications or the combination of the Original Code and Modifications, in 

each case including portions thereof. 

1.4 "Electronic Distribution Mechanism" means a mechanism generally accepted in the software development community for 

the electronic transfer of data. 

1.5 "Executable" means Covered Code in any form other than Source Code. 

1.6 "Initial Developer'' means the individual or entity identified as the Initial Developer in the Source Code notice required by 

Exhibit A. 

37

1.7 "Larger Work'' means a work which combines Covered Code or portions thereof with code not governed by the terms of 

this License. 

1.8 "License'' means this document. 

1.9 "Modifications'' means any addition to or deletion from the substance or structure of either the Original Code or any 

previous Modifications. When Covered Code is released as a series of files, a Modification is: 

A. Any addition to or deletion from the contents of a file 

containing Original Code or previous Modifications. 

B. Any new file that contains any part of the Original Code or 

previous Modifications. 

1.10. "Original Code'' means Source Code of computer software code which is described in the Source Code notice required 

by Exhibit A as Original Code, and which, at the time of its release under this License is not already Covered Code governed 

by this License. 

"Patent Claims" means any patent claim(s), now owned or hereafter acquired, including without limitation, method, 

process, and apparatus claims, in any patent Licensable by grantor. 

1.11. "Source Code" means the preferred form of the Covered Code for making modifications to it, including all modules it 

contains, plus any associated interface definition files, scripts used to control compilation and installation of an Executable, 

or source code differential comparisons against either the Original Code or another well known, available Covered Code of 

the Contributor's choice. The Source Code can be in a compressed or archival form, provided the appropriate decompression 

or de-archiving software is widely available for no charge. 

1.12. "You" (or "Your") means an individual or a legal entity exercising rights under, and complying with all of the terms of, 

this License or a future version of this License issued under Section 6.1. For legal entities, "You" includes any entity which 

controls, is controlled by, or is under common control with You. For purposes of this definition, "control" means (a) the 

power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (b) 

ownership of more than fifty percent (50 %) of the outstanding shares or beneficial ownership of such entity. 

2. Source Code License. 

2.1 The Initial Developer Grant. 

The Initial Developer hereby grants You a world-wide, royalty-free, non-exclusive license, subject to third party intellectual 

property claims: 

(a) under intellectual property rights (other than patent or trademark) Licensable by Initial Developer to use, reproduce, 

modify, display, perform, sublicense and distribute the Original Code (or portions thereof) with or without Modifications, 

and/or as part of a Larger Work; and 

(b) under Patents Claims infringed by the making, using or selling of Original Code, to make, have made, use, practice, sell, 

and offer for sale, and/or otherwise dispose of the Original Code (or portions thereof). 

(c) the licenses granted in this Section 2.1(a) and (b) are effective on the date Initial Developer first distributes Original Code 

under the terms of this License. 

(d) Notwithstanding Section 2.1(b) above, no patent license is granted: 1) for code that You delete from the Original Code; 2) 

separate from the Original Code; or 3) for infringements caused by: i) the modification of the Original Code or ii) the 

combination of the Original Code with other software or devices. 

2.2 Contributor Grant. 

Subject to third party intellectual property claims, each Contributor hereby grants You a world-wide, royalty-free, 

non-exclusive license: 

(a) under intellectual property rights (other than patent or trademark) Licensable by Contributor, to use, reproduce, modify, 

display, perform, sublicense and distribute the Modifications created by such Contributor (or portions thereof) either on an 

unmodified basis, with other Modifications, as Covered Code and/or as part of a Larger Work; and 

(b) under Patent Claims infringed by the making, using, or selling of Modifications made by that Contributor either alone 

and/or in combination with its Contributor Version (or portions of such combination), to make, use, sell, offer for sale, have 

made, and/or otherwise dispose of: 1) Modifications made by that Contributor (or portions thereof); and 2) the combination of 

Modifications made by that Contributor with its Contributor Version (or portions of such combination). 

(c) the licenses granted in Sections 2.2(a) and 2.2(b) are effective on the date Contributor first makes Commercial Use of the 

Covered Code. 


(d) Notwithstanding Section 2.2(b) above, no patent license is granted: 1) for any code that Contributor has deleted from the 

Contributor Version; 2) separate from the Contributor Version; 3) for infringements caused by: i) third party modifications of 

Contributor Version or ii) the combination of Modifications made by that Contributor with other software (except as part of 

the Contributor Version) or other devices; or 4) under Patent Claims infringed by Covered Code in the absence of 

Modifications made by that Contributor. 

3. Distribution Obligations. 

3.1 Application of License. 

The Modifications which You create or to which You contribute are governed by the terms of this License, including without 

limitation Section 2.2. The Source Code version of Covered Code may be distributed only under the terms of this License or a 

future version of this License released under Section 6.1, and You must include a copy of this License with every copy of the 

Source Code You distribute. You may not offer or impose any terms on any Source Code version that alters or restricts the 

applicable version of this License or the recipients' rights hereunder. However, You may include an additional document 

offering the additional rights described in Section 3.5. 

3.2 Availability of Source Code. 

Any Modification which You create or to which You contribute must be made available in Source Code form under the terms 

of this License either on the same media as an Executable version or via an accepted Electronic Distribution Mechanism to 

anyone to whom you made an Executable version available; and if made available via Electronic Distribution Mechanism, 

must remain available for at least twelve (12) months after the date it initially became available, or at least six (6) months 

after a subsequent version of that particular Modification has been made available to such recipients. You are responsible for 

ensuring that the Source Code version remains available even if the Electronic Distribution Mechanism is maintained by a 

third party. 

3.3 Description of Modifications. 

You must cause all Covered Code to which You contribute to contain a file documenting the changes You made to create that 

Covered Code and the date of any change. You must include a prominent statement that the Modification is derived, directly 

or indirectly, from Original Code provided by the Initial Developer and including the name of the Initial Developer in (a) the 

Source Code, and (b) in any notice in an Executable version or related documentation in which You describe the origin or 

ownership of the Covered Code. 

3.4 Intellectual Property Matters 

(a) Third Party Claims. 

If Contributor has knowledge that a license under a third party's intellectual property rights is required to exercise the rights 

granted by such Contributor under Sections 2.1 or 2.2, Contributor must include a text file with the Source Code distribution 

titled "LEGAL" which describes the claim and the party making the claim in sufficient detail that a recipient will know whom 

to contact. If Contributor obtains such knowledge after the Modification is made available as described in Section 3.2, 

Contributor shall promptly modify the LEGAL file in all copies Contributor makes available thereafter and shall take other 

steps (such as notifying appropriate mailing lists or newsgroups) reasonably calculated to inform those who received the 

Covered Code that new knowledge has been obtained. 

(b) Contributor APIs. 

If Contributor's Modifications include an application programming interface and Contributor has knowledge of patent 

licenses which are reasonably necessary to implement that API, Contributor must also include this information in the LEGAL 

file. 

(c) Representations 

Contributor represents that, except as disclosed pursuant to Section 3.4(a) above, Contributor believes that Contributor's 

Modifications are Contributor's original creation(s) and/or Contributor has sufficient rights to grant the rights conveyed by 

this License. 

3.5 Required Notices. 

You must duplicate the notice in Exhibit A in each file of the Source Code. If it is not possible to put such notice in a particular 

Source Code file due to its structure, then You must include such notice in a location (such as a relevant directory) where a 

user would be likely to look for such a notice. If You created one or more Modification(s) You may add your name as a 

Contributor to the notice described in Exhibit A. You must also duplicate this License in any documentation for the Source 

Code where You describe recipients' rights or ownership rights relating to Covered Code. You may choose to offer, and to 

charge a fee for, warranty, support, indemnity or liability obligations to one or more recipients of Covered Code. However, 

You may do so only on Your own behalf, and not on behalf of the Initial Developer or any Contributor. You must make it 

absolutely clear than any such warranty, support, indemnity or liability obligation is offered by You alone, and You hereby 

agree to indemnify the Initial Developer and every Contributor for any liability incurred by the Initial Developer or such 

Contributor as a result of warranty, support, indemnity or liability terms You offer. 

39

3.6. Distribution of Executable Versions. 

You may distribute Covered Code in Executable form only if the requirements of Section 3.1-3.5 have been met for that 

Covered Code, and if You include a notice stating that the Source Code version of the Covered Code is available under the 

terms of this License, including a description of how and where You have fulfilled the obligations of Section 3.2. The notice 

must be conspicuously included in any notice in an Executable version, related documentation or collateral in which You 

describe recipients' rights relating to the Covered Code. You may distribute the Executable version of Covered Code or 

ownership rights under a license of Your choice, which may contain terms different from this License, provided that You are 

in compliance with the terms of this License and that the license for the Executable version does not attempt to limit or alter 

the recipient's rights in the Source Code version from the rights set forth in this License. If You distribute the Executable 

version under a different license You must make it absolutely clear that any terms which differ from this License are offered 

by You alone, not by the Initial Developer or any Contributor. You hereby agree to indemnify the Initial Developer and every 

Contributor for any liability incurred by the Initial Developer or such Contributor as a result of any such terms You offer. 

3.7. Larger Works. 

You may create a Larger Work by combining Covered Code with other code not governed by the terms of this License and 

distribute the Larger Work as a single product. In such a case, You must make sure the requirements of this License are 

fulfilled for the Covered Code. 

4. Inability to Comply Due to Statute or Regulation. 

If it is impossible for You to comply with any of the terms of this License with respect to some or all of the Covered Code due 

to statute, judicial order, or regulation then You must: (a) comply with the terms of this License to the maximum extent 

possible; and (b) describe the limitations and the code they affect. Such description must be included in the LEGAL file 

described in Section 3.4 and must be included with all distributions of the Source Code. Except to the extent prohibited by 

statute or regulation, such description must be sufficiently detailed for a recipient of ordinary skill to be able to understand it. 

5. Application of this License. 

This License applies to code to which the Initial Developer has attached the notice in Exhibit A, and to related Covered Code. 

6. Versions of the License. 

6.1 New Versions. 

Netscape Communications Corporation ("Netscape") may publish revised and/or new versions of the License from time to 

time. Each version will be given a distinguishing version number. 

6.2 Effect of New Versions. 

Once Covered Code has been published under a particular version of the License, You may always continue to use it under 

the terms of that version. You may also choose to use such Covered Code under the terms of any subsequent version of the 

License published by Netscape. No one other than Netscape has the right to modify the terms applicable to Covered Code 

created under this License. 

6.3 Derivative Works. 

If You create or use a modified version of this License (which you may only do in order to apply it to code which is not already 

Covered Code governed by this License), You must (a) rename Your license so that the phrases "Mozilla", "MOZILLAPL", 

"MOZPL", "Netscape", "MPL", "NPL" or any confusingly similar phrase do not appear in your license (except to note that 

your license differs from this License) and (b) otherwise make it clear that Your version of the license contains terms which 

differ from the Mozilla Public License and Netscape Public License. (Filling in the name of the Initial Developer, Original Code 

or Contributor in the notice described in Exhibit A shall not of themselves be deemed to be modifications of this License.) 

7. DISCLAIMER OF WARRANTY. 

COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY OF ANY KIND, EITHER 

EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES THAT THE COVERED CODE IS FREE OF 

DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY 

AND PERFORMANCE OF THE COVERED CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY 

RESPECT, YOU (NOT THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY 

SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS 

LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER THIS DISCLAIMER. 

8. TERMINATION. 

8.1 This License and the rights granted hereunder will terminate automatically if You fail to comply with terms herein and fail 

to cure such breach within 30 days of becoming aware of the breach. All sublicenses to the Covered Code which are properly 

granted shall survive any termination of this License. Provisions which, by their nature, must remain in effect beyond the 

termination of this License shall survive. 


8.2. If You initiate litigation by asserting a patent infringement claim (excluding declatory judgment actions) against Initial 

Developer or a Contributor (the Initial Developer or Contributor against whom You file such action is referred to as 

"Participant") alleging that: 

(a) such Participant's Contributor Version directly or indirectly infringes any patent, then any and all rights granted by such 

Participant to You under Sections 2.1 and/or 2.2 of this License shall, upon 60 days notice from Participant terminate 

prospectively, unless if within 60 days after receipt of notice You either: (i) agree in writing to pay Participant a mutually 

agreeable reasonable royalty for Your past and future use of Modifications made by such Participant, or (ii) withdraw Your 

litigation claim with respect to the Contributor Version against such Participant. If within 60 days of notice, a reasonable 

royalty and payment arrangement are not mutually agreed upon in writing by the parties or the litigation claim is not 

withdrawn, the rights granted by Participant to You under Sections 2.1 and/or 2.2 automatically terminate at the expiration 

of the 60 day notice period specified above. 

(b) any software, hardware, or device, other than such Participant's Contributor Version, directly or indirectly infringes any 

patent, then any rights granted to You by such Participant under Sections 2.1(b) and 2.2(b) are revoked effective as of the 

date You first made, used, sold, distributed, or had made, Modifications made by that Participant. 

8.3 If You assert a patent infringement claim against Participant alleging that such Participant's Contributor Version directly 

or indirectly infringes any patent where such claim is resolved (such as by license or settlement) prior to the initiation of 

patent infringement litigation, then the reasonable value of the licenses granted by such Participant under Sections 2.1 or 2.2 

shall be taken into account in determining the amount or value of any payment or license. 

8.4 In the event of termination under Sections 8.1 or 8.2 above, all end user license agreements (excluding distributors and 

resellers) which have been validly granted by You or any distributor hereunder prior to termination shall survive termination. 

9. LIMITATION OF LIABILITY. 

UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY, WHETHER TORT (INCLUDING NEGLIGENCE), CONTRACT, OR 

OTHERWISE, SHALL YOU, THE INITIAL DEVELOPER, ANY OTHER CONTRIBUTOR, OR ANY DISTRIBUTOR OF COVERED CODE, 

OR ANY SUPPLIER OF ANY OF SUCH PARTIES, BE LIABLE TO ANY PERSON FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR 

CONSEQUENTIAL DAMAGES OF ANY CHARACTER INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF GOODWILL, 

WORK STOPPAGE, COMPUTER FAILURE OR MALFUNCTION, OR ANY AND ALL OTHER COMMERCIAL DAMAGES OR LOSSES, 

EVEN IF SUCH PARTY SHALL HAVE BEEN INFORMED OF THE POSSIBILITY OF SUCH DAMAGES. THIS LIMITATION OF 

LIABILITY SHALL NOT APPLY TO LIABILITY FOR DEATH OR PERSONAL INJURY RESULTING FROM SUCH PARTY'S 

NEGLIGENCE TO THE EXTENT APPLICABLE LAW PROHIBITS SUCH LIMITATION. SOME JURISDICTIONS DO NOT ALLOW THE 

EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THIS EXCLUSION AND LIMITATION MAY 

NOT APPLY TO YOU. 

10. U.S. GOVERNMENT END USERS. 

The Covered Code is a "commercial item," as that term is defined in 48 C.F.R. 2.101 (Oct. 1995), consisting of "commercial 

computer software" and "commercial computer software documentation," as such terms are used in 48 C.F.R. 12.212 (Sept. 

1995). Consistent with 48 C.F.R. 12.212 and 48 C.F.R. 227.7202-1 through 227.7202-4 (June 1995), all U.S. Government End 

Users acquire Covered Code with only those rights set forth herein. 

11. MISCELLANEOUS. 

This License represents the complete agreement concerning subject matter hereof. If any provision of this License is held to 

be unenforceable, such provision shall be reformed only to the extent necessary to make it enforceable. This License shall be 

governed by California law provisions (except to the extent applicable law, if any, provides otherwise), excluding its 

conflict-of-law provisions. With respect to disputes in which at least one party is a citizen of, or an entity chartered or 

registered to do business in the United States of America, any litigation relating to this License shall be subject to the 

jurisdiction of the Federal Courts of the Northern District of California, with venue lying in Santa Clara County, California, 

with the losing party responsible for costs, including without limitation, court costs and reasonable attorneys' fees and 

expenses. The application of the United Nations Convention on Contracts for the International Sale of Goods is expressly 

excluded. Any law or regulation which provides that the language of a contract shall be construed against the drafter shall 

not apply to this License. 

12. RESPONSIBILITY FOR CLAIMS. 

As between Initial Developer and the Contributors, each party is responsible for claims and damages arising, directly or 

indirectly, out of its utilization of rights under this License and You agree to work with Initial Developer and Contributors to 

distribute such responsibility on an equitable basis. Nothing herein is intended or shall be deemed to constitute any 

admission of liability. 

13. MULTIPLE-LICENSED CODE. 

Initial Developer may designate portions of the Covered Code as "Multiple-Licensed". "Multiple-Licensed" means that the 

Initial Developer permits you to utilize portions of the Covered Code under Your choice of the NPL or the alternative licenses, 

if any, specified by the Initial Developer in the file described in Exhibit A. 

41

EXHIBIT A -Mozilla Public License. 

"The contents of this file are subject to the Mozilla Public License Version 1.1 (the "License"); you may not use this file except 

in compliance with the License. You may obtain a copy of the License at http://www.mozilla.org/MPL/ 

Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express 

or implied. See the License for the specific language governing rights and limitations under the License. 

Barracuda Networks Products may contain programs that are copyright (c)1995-2005 International Business Machines 

Corporation and others. All rights reserved. These programs are covered by the following License: "Permission is hereby 

granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), 

to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, 

distribute, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, provided 

that the above copyright notice(s) and this permission notice appear in all copies of the Software and that both the above 

copyright notice(s) and this permission notice appear in supporting documentation." 

Barracuda Networks Products may include programs that are covered by the BSD License: "Redistribution and use in source 

and binary forms, with or without modification, are permitted provided that the following conditions are met: 

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 

Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer 

in the documentation and/or other materials provided with the distribution. 

The names of the authors may not be used to endorse or promote products derived from this software without specific prior 

written permission. 

THIS SOFTWARE IS PROVIDED ''AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT 

LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE." 

Barracuda Networks Products may include the libspf library which is Copyright (c) 2004 James Couzens & Sean Comeau, All 

rights reserved. It is covered by the following agreement: Redistribution and use in source and binary forms, with or without 

modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the 

above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce 

the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials 

provided with the distribution. THIS SOFTWARE IS PROVIDED ''AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, 


PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS MAKING USE OF THIS LICENSE OR ITS CONTRIBUTORS BE 

LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 

NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 

INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 

TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 

ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

Barracuda Networks Products may contain programs that are Copyright (c) 1998-2003 Carnegie Mellon University. All rights 

reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the 

following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions 

and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of 

conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. The name 

"Carnegie Mellon University" must not be used to endorse or promote products derived from this software without prior 

written permission. For permission or any other legal details, please contact Office of Technology Transfer, Carnegie Mellon 

University, 5000 Forbes Avenue, Pittsburgh, PA 15213-3890 (412) 268-4387, fax: (412) 268-7395, 

tech-transfer@andrew.cmu.edu . Redistributions of any form whatsoever must retain the following acknowledgment: "This 

product includes software developed by Computing Services at Carnegie Mellon University 

(http://www.cmu.edu/computing/)." CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS 

SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, AND IN NO EVENT SHALL 

CARNEGIE MELLON UNIVERSITY BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY 

DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, 

NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF 

THIS SOFTWARE. 

Barracuda Networks Products may contain programs and software that are copyright (c) 2000, 2001, 2002, 2003, 2004 

John Lim All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted 

provided that the following conditions are met: Redistributions of source code must retain the above copyright notice, this 

list of conditions and the following disclaimer. Redistributions in binary form must reproduce the above copyright notice, this 


list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 

Neither the name of the John Lim nor the names of its contributors may be used to endorse or promote products derived 

from this software without specific prior written permission. DISCLAIMER:THIS SOFTWARE IS PROVIDED BY THE 

COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 

LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 

DISCLAIMED. IN NO EVENT SHALL JOHN LIM OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 

SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 

GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 

THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 

ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

Barracuda Networks Products may contain programs and software that are copyright protected by: AMCC 215 Moffet Park 

Drive, Sunnyvale California, CA-94089, USAwww.amcc.com. AMCC grants to you a non-exclusive, non-transferable, 

non-sublicensable license to use the Product. 

LIMITS 

You may not copy, modify, rent, sell, distribute, or transfer any part of the Software except as provided in this Agreement, 

and you agree to prevent unauthorized copying of the Software; (2) you may not reverse engineer, decompile, or 

disassemble the Software; and (3) you many not sublicense the Software. 

OWNERSHIP OF SOFTWARE AND COPYRIGHTS 

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Permission to copy and distribute verbatim copies of this document is granted.(eay@cryptsoft.com).The implementation was 

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49

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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR ITS CONTRIBUTORS BE LIABLE FOR ANY 






============================================== 

This product includes cryptographic software written by Eric Young (eay@cryptsoft.com). This product includes software 

written by Tim Hudson (tjh@cryptsoft.com).Original SSLeay License Copyright (C) 1995-1998 Eric Young 

(eay@cryptsoft.com) All rights reserved. This package is an SSL implementation written by Eric Young (eay@cryptsoft.com). 

The implementation was written so as to conform with Netscapes SSL. This library is free for commercial and 

non-commercial use as long as the following conditions are aheared to. The following conditions apply to all code found in 

this distribution, be it the RC4, RSA, lhash, DES, etc., code; not just the SSL code. The SSL documentation included with this 

distribution is covered by the same copyright terms except that the holder is Tim Hudson (tjh@cryptsoft.com). Copyright 

remains Eric Young's, and as such any Copyright notices in the code are not to be removed. If this package is used in a 

product, Eric Young should be given attribution as the author of the parts of the library used. This can be in the form of a 

textual message at program startup or in documentation (online or textual) provided with the package. Redistribution and 

use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. 

Redistributions of source code must retain the copyright notice, this list of conditions and the following disclaimer. 2. 


in the documentation and/or other materials provided with the distribution. 3. All advertising materials mentioning features 

or use of this software must display the following acknowledgement: "This product includes cryptographic software written 

by Eric Young (eay@cryptsoft.com)." The word 'cryptographic' can be left out if the routines from the library being used are 

not cryptographic related :-). 4. If you include any Windows specific code (or a derivative thereof) from the apps directory 

(application code) you must include an acknowledgement: "This product includes software written by Tim Hudson 

(tjh@cryptsoft.com)." 

THIS SOFTWARE IS PROVIDED BY ERIC YOUNG "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 


DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 

SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 

GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 

THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 

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(eay@cryptsoft.com) All rights reserved. This package is an SSL implementation written by Eric Young (eay@cryptsoft.com). 

The implementation was written so as to conform with Netscapes SSL. This library is free for commercial and 

non-commercial use as long as the following conditions are aheared to. The following conditions apply to all code found in 

this distribution, be it the RC4, RSA, lhash, DES, etc., code; not just the SSL code. The SSL documentation included with this 

distribution is covered by the same copyright terms except that the holder is Tim Hudson (tjh@cryptsoft.com). Copyright 

remains Eric Young's, and as such any Copyright notices in the code are not to be removed. If this package is used in a 

product, Eric Young should be given attribution as the author of the parts of the library used. This can be in the form of a 

textual message at program startup or in documentation (online or textual) provided with the package. Redistribution and 

use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. 

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or use of this software must display the following acknowledgement: "This product includes cryptographic software written 

by Eric Young (eay@cryptsoft.com)". The word 'cryptographic' can be left out if the routines from the library being used are 

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51

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53

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55

or use of this software must display the following acknowledgement: "This product includes software developed by Yen Yen 

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Issue Date: Aug 6, 2010 

59

Barracuda Networks makes available the source code used to build Barracuda products available at source.barracuda.com. 

This directory includes all the programs that are distributed on the Barracuda products. Obviously not all of these programs 

are utilized, but since they are distributed on the Barracuda product we are required to make the source code available. 

(v2.5) 


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